Grease-gun for barrels and the like



A J WOOD. GREASE G UNFOB BARBELS AND' THE LIKE.

APPLICATION FILED H58- 24, 1 920. r

- Patented J une 28; 1921.

H 5 wwwboz l9 Wood UNITED, STATES PATENT, OFFICE.

A J' WOOD, OF GRAND RAPIDS, MICHTGAN, ASSIGNOR T0 BENNETT INJECTOR 'OOMPANY, OF MUSKEGON, MICHIGAN, A CORPORATION OF DELAWARE.

GREASE-GUN FORBARRELS AND THE LIKE.

T 0' all whom it may concern Be it known that I, A J W001), a citizen of the United States of America, residing at Grand Rapids, in the county of'Kent and State of Michigan, have invented certain new and useful Improvements in Grease- Guns for Barrels and the like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertainsto make'and use the same. i z

The present invention relates to a grease gun adaptedto be used in withdrawing lubricating grease from barrels, casks or the like, said grease gun being designed to deliver the greasetakento any desired point outside of the barrel, caskor the like. It is an object and purposeof the invention to construct a grease gun which maybe inserted through the bung hole of a barrel or cask and which may then be securely. at-

' tached thereto, thereafter being ready for n i h.)

operation to dispense grease as long as there is any left in the barrehcask orthe like. A further object of the invention is to make a grease gun which may be applied to different sizes of barrels or similar containers of grease, the gun being quickly adjustable for the difl'erentsizes with wh ch it works so asto reach, in all cases, to the lower side of the container of grease, so that'all of the grease may be removed. A still further object of the invention is to construct the grease gun' in a particularly simple and economical manner, this tending to the greater efficiency anddurability of the device {and furthermore,.to construct itso that it enters the relatively small'bung' hole of a barrel when the bung removed, without there being any'necessity of enlarging the opening to receive thedevice, and no need v 14 whlch has a passage therethrough comto mutilate or defacethebarrels in any par ticular. Various other objects'and purposes,

together with novel constructions for attaining the same will appear. fully and in de-- tail as understanding of the invention ,is

had from the following description, taken in connection with the accompanying draw- Figure 1 is a side elevationofthe grease gun, the same beingindicated as inworkmg connectionto a barrel whichisshowm-fragmentarily, longitudinal section, and

Specification of Letters Patent. Patented J 11 28, 1921, Application filed. February 24, 1920. serial No. 360,864.

' Fig. 2 is a vertical section through the grease gun.

F1 3 is a fragmentary enlarged section showing the packing connection between the telescoping parts of the device.

Like reference characters refer to like parts in the different figures of the drawing.

In the constructionlof the grease gun, a head 1 is provided from which attaching feet 2 extend. This head has a passage through it opening in the under side of the head and a tube 3 of sheet metal is threaded into said head at such opening. Any other suitable way of making a permanent connection may be resorted to as is obvious. The

point. The lower end of the outer tube 5 hasportions cut away leaving feet 8 with open spaces between'them as shown.

A piston rod 9 equipped at its lower end A with a valveless piston 10 is located lengthwiseof the tube 3, extending at its upper end through the head 1 and having an operating handle 11 secured to its upper end above the head. A nut 12 is threaded into the u'pper side of the head 1, the piston rod '10 passing therethrough and said nut serving to hold packing 13 in place, there being an air tight stuffing box made which does not permit the passage of air into the tube 3 around the piston rod. I

The head has an integral lateralextension municating with the passage in the main portion of the head. Adjacent its inner end a ball valve 15 is located insaid passage and is pressed against a suitable seat by a spring itudinal opening through it. A length of hose brother suitable equivalent flexible grease carrying member 18 is attached to mem er 17: y means 9? the coupling 19 16"which is compressed by the member 17 which threads into the open outer end of extension 14. Said member 17 also has a'lo'nso that there is a free passage from the tube 3 through head 1 and the various interposed" members to the hose 18 except for the ball valve15.. V r

This grease gun is adapted to be applied to barrels in which lar e quantities of lubricating grease are hel The barrel, illustrated at 20 usually has an Opening or bung hole 21 in a side which is normally closed after the lower end of tube 5 is stopped by striking the lower side of the barrel, the tube 3 is forced inwarduntil the attaching feet 2 come against the barrel. Screws are passed through said feet to hold the appliance in rigid relation .to the barrel. The

diameter of "the cap a is very slightly less than that of the bung hole 21 and the entire grease gun below the head 1 inserts into the barrel, only the headand parts attached thereto and the operating-handle showing above the barrel. The piston rod 9 is of such length that when the handle 11 is in its lowest position substantially againstthe head 1, the piston 10 extends a short distance below the lower end ofthe inner-tube 3 as indicated in Fig. 2. a

To withdraw grease from the barrel, the operating handlell is grasped and the piston .10 is movedup and down in the tube 3. With the piston at or near the upper end of the tube 3, when a downward stroke is made,

the ball 15 seats against its seat in the ex tension 14, precluding the entrance of any air or the return of any grease from the hose 18 to the tube 3, while air cannot enter around the piston rod 9' where it passes through the head 1. The piston fitssnugly in tube 3. Accordingly, it is evident that by the time the pistonhas reached the lower end of the tube 3, a vacuum has been made in'thetube and as soon (as the piston passes beyond the lower end of said tube 3, vgrease will flow around the piston'and ove'nthe same into thetube 3 being forced in by' atmospheric pressure.

The flared outlower end of tube 3facilitatesthe entrance of the grease andit also serves as a guidefor the piston on the up stroke thereof. On the up stroke the grease in tube 3 above thepiston is forced out'past the ball valve 15 and into the hose 18, and out of the same. The hose being flexible may be moved to differentpositions and the grease delivered fromthe outer end thereof to any desiredpoint within the range of movement of 'thehoses The construction is very simple in structure and operation, i durable and particularly efiicient. The grease passes from the barrel into the outer tube 5 through the openings at the lower end between the .proje'ctions 8. and'it is evident that practically all of the grease can be taken from the barrel with this appliance as all of it is taken into the appliance at the extreme lower end thereof which is located against the lower sideof thebarrel, fOne very practical feature of my invention is its ready application to barrels containing grease without. the

necessity of changing the barrelin any way,

,lateral'extension to the head having a pas sage communicating with the passage inthe head, a flexible conduit attached to the end of said extension, a spring actuated valve located in theextension and normally closing the passage from the head to said extension, a tube, connected to and depending from the head, said tube having a flared out lower end, a second tube into which the first tube telescopically inserts, said second tube having parts cutaway at its lower. end,

bushing :at the upper end of the second tube through which the first tube passes, a piston rod located lengthwise of the firstctube and passing through the head, a valvelesspis .ton at the lower end of the rod, and anoperating handle at the upper endof the rod,

said rodbeing of, such'length that the piston extends below lower 7 position.

the first tube when .in

c 2. In a deviceoftheeharacter described,

a head provided with a lateral extension, said head and extension having communicating passages therethrough, a spring actuated valve located in said extension and normally closing the passage. fromthe head to the'extension, attaching feet on the head, a tube attached to and depending fromthe head,

asecond tube into which the first tube telescopes, said second tube having portions cut away at its lower end, a piston. rod positioned lengthwise of the-first tube and, extending through the. head, an operating 'handle'at the upper endfof the r-odyand a -piston at the lower end of the rod, said 'rod ,being of such length I that the piston passes ."below' the 'lower end of the firsttube when in lowerposition. c

3, In a d vi e of the chamc erf s ri e a head having a passage therethrough, a spring actuated valve normally closing the passage, attaching feet extending from the head, a tube connected to and depending from the head, a second larger tube into which the first tube extends, a piston rod having a piston at its lower end located lengthwise of the first tube and passing through the head, and means to move the rod and attached piston back and forth in said first tube, said rod being of such length that the piston extends below the lower end of the first tube and into the second tube when in lowermost position.

.4. In a device of the character described, a head having a passage therethrough, a spring actuated valve in said passage normally closing the same, a tube connected to and depending below the head, a piston rod located lengthwise of the tube, a piston attached to the lower end of the rod, and a handle at the upper end of the rod above the head, saidrod passing through the head and being of such length that the piston passes below the lower end of the tube in lowermost position, and a larger tube extending below the lower end of the first tube, substantially as described.

5. In combination, a head having a passage .therethrough, a tube depending from the'head and provided with a flared-out lower end, a piston rod located lengthwise of the tube-and passing through the head, a piston at the lower end of the rod, means attached to the upper end ofthe rod whereby it may be manually moved back and forth in the tube, said rod being of such length that the piston passes below the lower end of the tube in lowermost position, means in the head permitting passage of grease or the like from the tube through the head but preventing return thereof, and a larger tube at the lower end of the first tube and extending below the same into which the piston passes at its lowermost position of movement, substantially as described.

6. In combination with a barrel or similar container having a relatively small opening in a side thereof, a head attached to said barrel over said opening, a tube depending from said head through the opening, a tube of larger diameter around the first tube and movable thereon so that, its lower end contacts with the lower side of the barrel, said larger tube having portions removed at its lower end, a piston rod passing through the head into the first tube, a piston on the lower end of the rod, an operating means on the upper end of the rod, said rod being of a length such that the piston passes below the lower end of the first tube in lowermost position, and said head having acpassage therethrough communicating with the first tube, and check valve means in said passage substantially as and for the purpose described.

lln testimony whereof I afiix my signa-. ture. I

A. J. WOOD. 

